Question

The sum of two numbers is 15 and their diffrence is 7

Answer 1

Step-by-step explanation:

Let the number be x and y

so,

X + Y = 15 ......1st

x- y = 7 .........2nd

than,

x = 15 - y

now, substituting the value of x

(15-y ) - y = 7

15y + y² = 7

solve by 1st into last